ChileanJAR

To reduce the error due to different pore sizes, the bulk density of 12 soil samples was determined, using clods of different heights (1.25; 2.25; 3.25; and 4.25 cm). For each sample, a graph was drawn with the relation between size of clod and bulk density obtained. This relation was rectilinear, and the estimated regresion had a good level of significance; the origen ordinate value (“a”) was a good estimate for bulk density. This “a” value can be obtained, in a simplified way, by connecting with a straight une the averages of two determinations with 1.25cm clods and of two with 4.25 clods.